main
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Last change
on this file since d565449 was d565449, checked in by stefan toskovski <stefantoska84@…>, 4 weeks ago |
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Update repo after prototype presentation
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Property mode
set to
100644
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File size:
438 bytes
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| [d565449] | 1 | 'use strict';
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| 2 |
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| 3 | var callBound = require('call-bind/callBound');
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| 4 |
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| 5 | var $deref = callBound('WeakRef.prototype.deref', true);
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| 6 |
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| 7 | module.exports = typeof WeakRef === 'undefined'
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| 8 | ? function isWeakRef(value) { // eslint-disable-line no-unused-vars
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| 9 | return false;
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| 10 | }
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| 11 | : function isWeakRef(value) {
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| 12 | if (!value || typeof value !== 'object') {
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| 13 | return false;
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| 14 | }
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| 15 | try {
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| 16 | $deref(value);
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| 17 | return true;
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| 18 | } catch (e) {
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| 19 | return false;
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| 20 | }
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| 21 | };
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